Mentha pulegium - Perennial herb. Used medicinally   by the ancient Egyptians and Greeks. In the wild it grows in wet valleys, lake edges and beside streams. The fresh or dried leaves are used to repel ants, fleas, moths and rodents. This form has larger leaves than the standard pennyroyal. It has a prostrate growth habit. It is a good ground cover in damp areas, but being a mint it can be invasive. Greek pennyroyal can be grown in pots, and looks very attractive when the foliage cascades down the sides. The Greeks hold this herb in high esteem as a medicinal herb, and they also make a tea from it.